Accessory Genie QuickCHARGE QI Wireless 2800mAh Charging Pad Power Bank with Tri-Device Charging and Portable, Slim Design - Works with Nokia Lumia 1520, 1020, 928 and More QI Enabled Devices QI charge pad allows for wireless charging of QI enabled smartphones Power the charger via USB or included AC adapter QI technology offers the ability to charge certain smartphones and tablets without plugging any cable into those devices Compact, slim design makes it comfortable to carry in any pocket, purse, or backpack Dimensions: 2.5" x 0.4" x 2.5"